Java tutorial
/******************************************************************************* * Copyright (c) 2011 Wind River Systems, Inc. and others. All rights reserved. * This program and the accompanying materials are made available under the terms * of the Eclipse Public License v1.0 which accompanies this distribution, and is * available at http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Wind River Systems - initial API and implementation * William Chen (Wind River) - [345384] Provide property pages for remote file system nodes *******************************************************************************/ package org.eclipse.tm.te.tcf.filesystem.controls; import java.util.Collections; import org.eclipse.core.commands.Command; import org.eclipse.core.commands.ExecutionEvent; import org.eclipse.core.expressions.EvaluationContext; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ILabelDecorator; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.ISelectionProvider; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeColumn; import org.eclipse.tm.te.tcf.filesystem.internal.nls.Messages; import org.eclipse.tm.te.ui.interfaces.IUIConstants; import org.eclipse.tm.te.ui.trees.AbstractTreeControl; import org.eclipse.ui.IDecoratorManager; import org.eclipse.ui.ISources; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.IWorkbenchPartSite; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.commands.ICommandService; import org.eclipse.ui.navigator.ICommonActionConstants; import org.eclipse.ui.part.MultiPageSelectionProvider; /** * File system browser control. */ public class FSTreeControl extends AbstractTreeControl implements ISelectionChangedListener, IDoubleClickListener { /** * Constructor. */ public FSTreeControl() { super(); } /** * Constructor. * * @param parentPart The parent workbench part this control is embedded in or <code>null</code>. */ public FSTreeControl(IWorkbenchPart parentPart) { super(parentPart); } /* (non-Javadoc) * @see org.eclipse.tm.te.tcf.vtl.ui.datasource.controls.trees.AbstractTreeControl#configureTreeViewer(org.eclipse.jface.viewers.TreeViewer) */ @Override protected void configureTreeViewer(TreeViewer viewer) { super.configureTreeViewer(viewer); Tree tree = viewer.getTree(); if (hasColumns()) { TreeColumn column = new TreeColumn(tree, SWT.LEFT); column.setText(Messages.FSTreeControl_column_name_label); column.setWidth(300); column = new TreeColumn(tree, SWT.RIGHT); column.setText(Messages.FSTreeControl_column_size_label); column.setWidth(100); column = new TreeColumn(tree, SWT.RIGHT); column.setText(Messages.FSTreeControl_column_modified_label); column.setWidth(200); } tree.setHeaderVisible(hasColumns()); viewer.addDoubleClickListener(this); } /** * Returns if or if not to show the tree columns. * * @return <code>True</code> to show the tree columns, <code>false</code> otherwise. */ protected boolean hasColumns() { return true; } /* (non-Javadoc) * @see org.eclipse.tm.te.tcf.vtl.ui.datasource.controls.trees.AbstractTreeControl#doCreateTreeViewerContentProvider(org.eclipse.jface.viewers.TreeViewer) */ @Override protected ITreeContentProvider doCreateTreeViewerContentProvider(TreeViewer viewer) { return new FSTreeContentProvider(); } /* (non-Javadoc) * @see org.eclipse.tm.te.tcf.vtl.ui.datasource.controls.trees.AbstractTreeControl#doCreateTreeViewerLabelProvider(org.eclipse.jface.viewers.TreeViewer) */ @Override protected ILabelProvider doCreateTreeViewerLabelProvider(TreeViewer viewer) { FSTreeLabelProvider labelProvider = new FSTreeLabelProvider(viewer); IWorkbench workbench = PlatformUI.getWorkbench(); IDecoratorManager manager = workbench.getDecoratorManager(); ILabelDecorator decorator = manager.getLabelDecorator(); return new FSTreeDecoratingLabelProvider(labelProvider, decorator); } /* (non-Javadoc) * @see org.eclipse.tm.te.tcf.vtl.ui.datasource.controls.trees.AbstractTreeControl#doCreateTreeViewerSelectionChangedListener(org.eclipse.jface.viewers.TreeViewer) */ @Override protected ISelectionChangedListener doCreateTreeViewerSelectionChangedListener(TreeViewer viewer) { return this; } /* (non-Javadoc) * @see org.eclipse.tm.te.tcf.vtl.ui.datasource.controls.trees.AbstractTreeControl#doCreateTreeViewerComparator(org.eclipse.jface.viewers.TreeViewer) */ @Override protected ViewerComparator doCreateTreeViewerComparator(TreeViewer viewer) { return new FSTreeViewerComparator(viewer, (ILabelProvider) viewer.getLabelProvider()); } /* (non-Javadoc) * @see org.eclipse.tm.te.tcf.vtl.ui.datasource.controls.trees.AbstractTreeControl#getAutoExpandLevel() */ @Override protected int getAutoExpandLevel() { return 0; } /* (non-Javadoc) * @see org.eclipse.tm.te.tcf.vtl.ui.datasource.controls.trees.AbstractTreeControl#getContextMenuId() */ @Override protected String getContextMenuId() { return IUIConstants.ID_CONTROL_MENUS_BASE + ".menu.fs"; //$NON-NLS-1$; } /* (non-Javadoc) * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent) */ @Override public void selectionChanged(SelectionChangedEvent event) { IWorkbenchPart parent = getParentPart(); if (parent != null) { IWorkbenchPartSite site = parent.getSite(); if (site != null) { ISelectionProvider selectionProvider = site.getSelectionProvider(); if (selectionProvider instanceof MultiPageSelectionProvider) { // Propagate the selection event to update the selection context. ((MultiPageSelectionProvider) selectionProvider).fireSelectionChanged(event); } } } } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IDoubleClickListener#doubleClick(org.eclipse.jface.viewers.DoubleClickEvent) */ @Override public void doubleClick(DoubleClickEvent event) { // If an handled and enabled command is registered for the ICommonActionConstants.OPEN // retargetable action id, redirect the double click handling to the command handler. // // Note: The default tree node expansion must be re-implemented in the active handler! ICommandService service = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class); Command command = service != null ? service.getCommand(ICommonActionConstants.OPEN) : null; if (command != null && command.isDefined() && command.isEnabled()) { try { ISelection selection = event.getSelection(); EvaluationContext ctx = new EvaluationContext(null, selection); ctx.addVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME, selection); ctx.addVariable(ISources.ACTIVE_MENU_SELECTION_NAME, selection); ctx.addVariable(ISources.ACTIVE_WORKBENCH_WINDOW_NAME, PlatformUI.getWorkbench().getActiveWorkbenchWindow()); IWorkbenchPart part = getParentPart(); if (part != null) { IWorkbenchPartSite site = part.getSite(); ctx.addVariable(ISources.ACTIVE_PART_ID_NAME, site.getId()); ctx.addVariable(ISources.ACTIVE_PART_NAME, part); ctx.addVariable(ISources.ACTIVE_SITE_NAME, site); ctx.addVariable(ISources.ACTIVE_SHELL_NAME, site.getShell()); } ExecutionEvent executionEvent = new ExecutionEvent(command, Collections.EMPTY_MAP, part, ctx); command.executeWithChecks(executionEvent); } catch (Exception e) { e.printStackTrace(); } } } }